1970 Evinrude Ski-Twin 33 HP Service Repair Manual P/N 4687, Page 45Get this manual
Quality of the image is intentionally reduced!
grinding an angle on the edge, and breaking the lower sharp edge to prevent damage to lower ring landSee Figure 5-17 Check piston for size and roundness, uSing micrometerSee Figure 5-18 Piston skirt m